Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
AA

A. Ahlstrom — 235 Patents

Rank (All Time): #3,201 of 105,732Top 4%
166 inventors
235 Patents All Time

Patents per Year

Patents granted per year, 1986 to 1999Bar chart with a peak of 34 patents in 1992.peak 341986: 1 patents19861987: 8 patents1988: 14 patents19881989: 19 patents1990: 33 patents19901991: 19 patents1992: 34 patents19921993: 30 patents1994: 24 patents19941995: 22 patents1996: 21 patents19961997: 3 patents1998: 5 patents19981999: 2 patents1999

Top Inventors at A. Ahlstrom All Time

Showing 1–50 of 166 inventors

RankNamePatents
1 Folke Engstrom 27
2 Kaj Henricson 25
3 Juhani Isaksson 16
#4 Timo Hyppanen 14
#4 Toivo Niskanen 14
#6 Reijo Kuivalainen 13
#6 Reijo Vesala 13
#6 Vesa Vikman 13
#9 Olavi Pikka 12
#10 Matti Hiltunen 10
#11 Jukka Timperi 9
#11 Pentti Vikio 9
#13 Erkki Kiiskila 8
#13 Frey Frejborg 8
#13 Raimo Kohonen 8
#16 Risto Ljokkoi 7
#16 Rolf E. Malmstrom 7
#18 Esko Mattelmaki 6
#18 Jorma Elonen 6
#18 Jorma Nieminen 6
#18 Yam Y. Lee 6
#22 Johan Gullichsen 5
#22 Pasi Immonen 5
#22 Rolf Ryham 5
#25 Bertel K. Hakulin 4
#25 Eric J. Oakes 4
#25 Erkki Savolainen 4
#25 Harri Qvintus 4
#25 Jukka Heino 4
#25 Kari Peltonen 4
#25 Karukkampalayam M. Sellakumar 4
#25 Olli Arpalahti 4
#25 Ragnar G. Lundqvist 4
#25 Raimo Pitkanen 4
#25 Seppo K. Kokkonen 4
#25 Voitto Reponen 4
#37 Brian F. Greenwood 3
#37 Eero Berg 3
#37 Harry Lampenius 3
#37 Hannu Ronkonharju 3
#37 Heikki Manninen 3
#37 Kurt Westerlund 3
#37 Mika P. Makela 3
#37 Pertti Hynninen 3
#37 Seppo Ruottu 3
#37 Tapio Peroaho 3
#47 Anja Klarin 2
#47 Antero Laine 2
#47 Charles M. Davis 2
#47 Erkki A. Ruuskanen 2